How to import opencv in python on clear linux?

I have already installed computer-vision-basic. Then doing:

  1. python (ok)
  2. import opencv (fail)

msg:
root@clr-1c ~ # python
Python 3.7.2 (default, Mar 1 2019, 00:40:03)
[GCC 8.3.1 20190228 gcc-8-branch@269272] on linux
Type “help”, “copyright”, “credits” or “license” for more information.

import opencv
Traceback (most recent call last):
File “”, line 1, in
ModuleNotFoundError: No module named ‘opencv’

someone could help to solve this. I have no idea now.

pip install opencv-python
python
>>> import cv2